Colour of fireclay bricks is_________________?

Related Mcqs:

Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?

A. 1800 B. 2200 C. 2400 D. 2700...

Thermal spalling mainly occurs during _____________ of furnaces?

A. Cooling down B. Warming up C. Both A. & B. D. Neither A. nor B....

Test piece for determination of RUL of a refractory is heated in a/an____________________?

A. Oxidising atmosphere B. Reducing atmosphere C. Electric furnace D. Neutral atmosphere...

Pyrometric cone equivalent (PCE) of a refractory is the measure of its_________________?

A. Spalling resistance B. Fusion point C. Resistance to slag penetration D. Resistance to carbon monoxide attack...

Pick out the wrong statement ?

A. Refractories used in muffle furnace should have low thermal conductivity B. The electrical resistivity of refractories drops rapidly with rise in temperature C. For reducing spalling tendency, the refractory should be well fired and its porosity should be more D. Refractoriness under load (RUL) of a refractory is always less than its refractoriness...